We’ve developed an app for iPhone and iPad called Fifteenky that lets you collect awesome jigsaw puzzles with paintings. There are 25 levels to go, each of which offers a painting by a famous artist, such as Leonardo da Vinci or Michelangelo. With each new level, the game becomes progressively difficult as the number of blocks grows and there appear some restrictions on the possible movements on the playing field. The game has the autosave feature that allows you to continue the unfinished game at any time.